1397274617 has 2 divisors, whose sum is σ = 1397274618. Its totient is φ = 1397274616.

The previous prime is 1397274583. The next prime is 1397274643. The reversal of 1397274617 is 7164727931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1393603561 + 3671056 = 37331^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397274617 - 2¹⁸ = 1397012473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397274667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698637308 + 698637309.

It is an arithmetic number, because the mean of its divisors is an integer number (698637309).

Almost surely, 2^1397274617 is an apocalyptic number.

It is an amenable number.

1397274617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397274617 is an equidigital number, since it uses as much as digits as its factorization.

1397274617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 47.

The square root of 1397274617 is about 37380.1366637416. The cubic root of 1397274617 is about 1117.9625524690.

The spelling of 1397274617 in words is "one billion, three hundred ninety-seven million, two hundred seventy-four thousand, six hundred seventeen".